Brompton Brakes and Gears Cable Replacements
#1
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Brompton Brakes and Gears Cable Replacements
Hi Guys
It is now 2 years since I got my 2011 6 Speed Brompton. I have ridden in wet weather a lot. These days I do bike maintenance weekly (clean chain and oil it, plus tyre pressure) however still when I change gear, the change is not sudden, it take it like a second or two, then it changes. My guess is that the cables have had so much dust and dirt in them, that movement is restricted.
So I would like to replace the brakes and gear cables. I have two questions:
1) How hard is it? Are there any instructional videos? Only one I can find was about how to position them (official brompton channel), not how to actually replace them.
2) Can you link me to the ones I need please? I go to SJS Cycles, but there are so many listed that I am worried I might buy the wrong ones
Any help would be greatly appreciated.
Thank You.
It is now 2 years since I got my 2011 6 Speed Brompton. I have ridden in wet weather a lot. These days I do bike maintenance weekly (clean chain and oil it, plus tyre pressure) however still when I change gear, the change is not sudden, it take it like a second or two, then it changes. My guess is that the cables have had so much dust and dirt in them, that movement is restricted.
So I would like to replace the brakes and gear cables. I have two questions:
1) How hard is it? Are there any instructional videos? Only one I can find was about how to position them (official brompton channel), not how to actually replace them.
2) Can you link me to the ones I need please? I go to SJS Cycles, but there are so many listed that I am worried I might buy the wrong ones
Any help would be greatly appreciated.
Thank You.
#2
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I have to guess about your Mechanical competence on this given your questions ..
Its not hard , but I started working on my own Bikes when JFK was still breathing.
Change which gear the 2 on the outside or the 3 inside the Hub?
no they are not sudden like a light switch , you are making an unrealistic demand ..
maybe you will like a High end Di2 race bike drivetrain better?
What side of the Atlantic are You?
maybe you can go back to the Dealer and say "make it So"
Its not hard , but I started working on my own Bikes when JFK was still breathing.
Change which gear the 2 on the outside or the 3 inside the Hub?
no they are not sudden like a light switch , you are making an unrealistic demand ..
maybe you will like a High end Di2 race bike drivetrain better?
What side of the Atlantic are You?
maybe you can go back to the Dealer and say "make it So"
#3
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Brompton do ready made cable sets in the correct lenghts and afaik the cable inners are all Teflon lined ensuring this aspect is sorted, giving you a slicker cable that returns better than a standard inner. Essential on the long cable runs on a small compact folder.
If you want a slicker cable set up that will return better Teflon lined outer cables can be used, but these will need cutting to lenght. If you do this you need a good set of cable cutters.
Lastly add a touch of light lubricate even to a Teflon cable.
If you want a slicker cable set up that will return better Teflon lined outer cables can be used, but these will need cutting to lenght. If you do this you need a good set of cable cutters.
Lastly add a touch of light lubricate even to a Teflon cable.
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Thanks Bhkyte. The ready made ones from Brompton are what I'm after, but they have so many options on SJS Cycles, I don't know which is the correct set to buy for mine :/
#5
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Correct set is what came on it in the 1st place..
S bar set is shorter M Bar set is Longer , H ,longer still ..
The folks at SJS have an Email Address and A telephone to communicate with them directly .
Now, Brompton,
They have Bought Jagwire's housing and the Coated cables for their Manufacturing , Now..
It is possible, If you have sufficient Tools, to Cut nad finish Housing ends, and install replacement cables ,
matching what you Have already ,for length.. cable cutters , a file or bench grinder and so Forth.
One thing I am Mindful of , having worked on Women's Bikes that also have the brake cable in a U bend ,
entering from the Bottom of their side pull Brake caliper.. water Puddles in the housing..
The Bellows they add to Brompton's, now, Helps,
(I added some from V brakes to the Mk 2 I had for awhile),
But they are not always staying in Place ..
I just modified Mine , with the little doughnuts supplied other bikes, to keep open cable runs
from rattling against frame tubes.
... is what I filled the gap above the bellows boot,
so it stays in contact with the bottom , so as to resist water entry.
another possible Mod ; a split in the housing at its lowest point , joined with a sleeve to retain function,
But offering a Drain Point so water will leak back out.
S bar set is shorter M Bar set is Longer , H ,longer still ..
The folks at SJS have an Email Address and A telephone to communicate with them directly .
Now, Brompton,
They have Bought Jagwire's housing and the Coated cables for their Manufacturing , Now..
It is possible, If you have sufficient Tools, to Cut nad finish Housing ends, and install replacement cables ,
matching what you Have already ,for length.. cable cutters , a file or bench grinder and so Forth.
One thing I am Mindful of , having worked on Women's Bikes that also have the brake cable in a U bend ,
entering from the Bottom of their side pull Brake caliper.. water Puddles in the housing..
The Bellows they add to Brompton's, now, Helps,
(I added some from V brakes to the Mk 2 I had for awhile),
But they are not always staying in Place ..
I just modified Mine , with the little doughnuts supplied other bikes, to keep open cable runs
from rattling against frame tubes.
... is what I filled the gap above the bellows boot,
so it stays in contact with the bottom , so as to resist water entry.
another possible Mod ; a split in the housing at its lowest point , joined with a sleeve to retain function,
But offering a Drain Point so water will leak back out.
Last edited by fietsbob; 01-13-14 at 11:51 AM.
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I'll piggy-back on the thread.
On a 2014 Brompton, I'd like to change the derailleur cable, ie the left-side shifter.
Even a 2mm hex key is too big to loosen the bolt:
How do you undo the cable?
Thank you.
--
Edit: It requires a 1,5mm hex key.
On a 2014 Brompton, I'd like to change the derailleur cable, ie the left-side shifter.
Even a 2mm hex key is too big to loosen the bolt:
How do you undo the cable?
Thank you.
--
Edit: It requires a 1,5mm hex key.
Last edited by Winfried; 03-16-18 at 08:57 AM.
#7
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Going back the original post...slow shifting gears in the hub, not the two speed shifter can be addresses by putting a few ccs of oil in the hub through the right hand axle after taking the shifter rod out. I use synthetic 5-20 car oil that is liquid in all weather, and a little when the hub gets noisy again as it slowly seeps out.
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You get the right size key is the answer. Just changed mine with a key bought from Bricomarché, sans problème.
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Going back the original post...slow shifting gears in the hub, not the two speed shifter can be addresses by putting a few ccs of oil in the hub through the right hand axle after taking the shifter rod out. I use synthetic 5-20 car oil that is liquid in all weather, and a little when the hub gets noisy again as it slowly seeps out.